rename tab open -> open on tab

Author: kyazdani42

README.md

@@ -42,11 +42,11 @@ require'nvim-tree'.setup {
   -- open the tree when running this setup function
   open_on_setup       = false,
   -- will not open on setup if the filetype is in this list
-  ignore_ft_on_setup = {},
+  ignore_ft_on_setup  = {},
   -- closes neovim automatically when the tree is the last **WINDOW** in the view
   auto_close          = false,
   -- opens the tree when changing/opening a new tab if the tree wasn't previously opened
-  tab_open            = false,
+  open_on_tab         = false,
   -- hijack the cursor in the tree to put it at the start of the filename
   hijack_cursor       = false,
   -- updates the root directory of the tree on `DirChanged` (when your run `:cd` usually) 

doc/nvim-tree-lua.txt

@@ -69,9 +69,9 @@ function.
       disable_netrw       = true,
       hijack_netrw        = true,
       open_on_setup       = false,
-      ignore_ft_on_setup = {},
+      ignore_ft_on_setup  = {},
       auto_close          = false,
-      tab_open            = false,
+      open_on_tab         = false,
       hijack_cursor       = false,
       update_cwd          = false,
       update_focused_file = {
@@ -113,7 +113,7 @@ Here is a list of the options available in the setup call:
   type: `boolean`
   default: `false`
 
-- |tab_open|: opens the tree automatically when switching tabpage or opening a new
+- |open_on_tab|: opens the tree automatically when switching tabpage or opening a new
   tabpage if the tree was previously open.
   type: `boolean`
   default: `false`

lua/nvim-tree.lua

@@ -380,7 +380,7 @@ local function setup_autocommands(opts)
   if opts.auto_close then
     vim.cmd "au WinClosed * lua require'nvim-tree'.on_leave()"
   end
-  if opts.tab_open then
+  if opts.open_on_tab then
     vim.cmd "au TabEnter * lua require'nvim-tree'.tab_change()"
   end
   if opts.hijack_cursor then
@@ -400,8 +400,8 @@ local DEFAULT_OPTS = {
   disable_netrw       = true,
   hijack_netrw        = true,
   open_on_setup       = false,
+  open_on_tab         = false,
   auto_close          = false,
-  tab_open            = false,
   hijack_cursor       = false,
   update_cwd          = false,
   update_focused_file = {